| 单词 | electrical resistance |
| 例句 | The work may also lead to a new, miniaturized standard for electrical resistance that could calibrate electronic devices directly on the factory floor, eliminating the need to send them to an off-site standards laboratory. Twisted science: New quantum ruler to explore exotic matter 2023-10-05T04:00:00Z Right now, we're wasting tons of power fighting basic electrical resistance in every electronic device and every electrical grid. Energy breakthrough or resistance letdown? Here's what's so super about superconductors 2023-08-10T04:00:00Z The Physical Reviews Letters inquiry focused on one figure in the paper that purported to show electrical resistance in manganese sulfide. A Looming Retraction Casts a Shadow Over a Field of Physics 2023-07-26T04:00:00Z But now, a group of researchers at the University of Illinois Chicago reports that it has verified a critical measurement: the apparent vanishing of electrical resistance. New Study Bolsters Room-Temperature Superconductor Claim 2023-06-23T04:00:00Z Superconductor-based computing systems, where electrical resistance in the switches and wires falls to zero, might solve the cooling challenge that increasingly bedevils the world’s data centers. A Tech Industry Pioneer Sees a Way for the U.S. to Lead in Advanced Chips 2023-04-19T04:00:00Z In addition to looking at magnetic susceptibility, James Hamlin, a physicist at the University of Florida, examined the electrical resistance data from the 2020 Nature paper. Controversy Surrounds Blockbuster Superconductivity Claim 2023-03-10T05:00:00Z When they dialed the pressure back up to as little as 0.3 gigapascals, the blue fleck turned pink as the electrical resistance plunged to zero. ‘Revolutionary’ blue crystal resurrects hope of room temperature superconductivity 2023-03-08T05:00:00Z A century ago, physicists discovered materials, now called superconductors, where the electrical resistance seemingly magically disappeared. A Room-Temperature Superconductor Discovery Aims to Overcome Resistance 2023-03-08T05:00:00Z Using a sample provided by Dr. Dias, Dr. Hemley’s laboratory performed independent measurements of the electrical resistance as the material was cooled under high pressure. New Study Bolsters Room-Temperature Superconductor Claim 2023-06-23T04:00:00Z These appliances run on electricity and move heat, instead of creating it, and so can be three to five times more efficient than traditional gas or electrical resistance heaters. 3 ways to tap billions in new money to go green — starting next month 2022-12-29T05:00:00Z When a material reaches a superconducting state, its electrical resistance drops to zero. Controversy Surrounds Blockbuster Superconductivity Claim 2023-03-10T05:00:00Z The system uses an electrical resistance heater to turn electricity into heat, a heat storage system, and heat transfer to circulate the thermal oil that powers the factory's fryers. PepsiCo to make Cheetos and Lay's chips using Dutch green electricity 2022-10-07T04:00:00Z Not only do superconductors carry electricity with essentially zero electrical resistance, but they also possess the strange ability known as the Meissner effect that ensures zero magnetic field inside the material. A Room-Temperature Superconductor Discovery Aims to Overcome Resistance 2023-03-08T05:00:00Z Dr. Hemley and his colleagues observed sharp drops in electrical resistance in the material. New Study Bolsters Room-Temperature Superconductor Claim 2023-06-23T04:00:00Z When you run electric currents through them, you change the electrical resistance. Making Computer Chips Act More like Brain Cells 2022-08-29T04:00:00Z Other properties used to measure temperature include electrical resistance and color, as shown in Figure 13.4, and the emission of infrared radiation, as shown in Figure 13.5. College Physics for AP Courses 2015-08-12T00:00:00Z Formaldehyde is used in the manufacture of Bakelite, a hard plastic having high chemical and electrical resistance. Chemistry 2019-02-14T00:00:00Z The directive was prompted by high electrical resistance within the gust suppression sensor because of corrosion. U.S. FAA issues new safety directive on Boeing 777 airplanes 2022-08-02T04:00:00Z “They have done the electrical resistance measurements to confirm our results,” Dr. Dias said in an interview. New Study Bolsters Room-Temperature Superconductor Claim 2023-06-23T04:00:00Z The electrical resistance R produced by wiring resistors R1 and R2 in parallel can be calculated from the formula 1 = 1 + 1 . Calculus, Volume 3 2016-03-30T00:00:00Z As a heater, a heat pump is several times more efficient than conventional electrical resistance heating. Algebra and Trigonometry 2015-02-13T00:00:00Z The controversy centers on a paper in the 15 October 2020 issue of Nature reporting the first material able to conduct electricity without electrical resistance above the freezing point of water. Criticism of room temperature superconductor ‘temporarily removed’ from journal 2021-11-16T05:00:00Z Superconductors are used in MRIs and particle accelerators, but to maintain zero electrical resistance they must stay at frigid temperatures. The quest for room-temperature superconductors that don’t require extreme pressure 2021-08-31T04:00:00Z A magical material that could effortlessly conduct electricity at room temperatures would likely transform civilization, reclaiming energy otherwise lost to electrical resistance and opening possibilities for novel technologies. New Study Bolsters Room-Temperature Superconductor Claim 2023-06-23T04:00:00Z At such frigid temperatures, electrical resistance vanishes because electrons no longer bump into atoms as they travel and give up a bit of their energy to heat. Thanks to a bit of diamond smashing, practical superconductivity could be close to reality 2021-08-26T04:00:00Z Fulfilling a decades-old quest, this week researchers report creating the first superconductor that does not have to be cooled for its electrical resistance to vanish. After decades, room temperature superconductivity achieved 2020-10-14T04:00:00Z It was at Bell Labs that the odd electrical resistance problem caught her attention. Myriam Sarachik Never Gave Up on Physics 2020-08-31T04:00:00Z Although such a structure is a fundamental component of many devices today, it is difficult to achieve the superconducting-diode effect by this strategy because a non-zero electrical resistance at the junction is inevitable. One-way supercurrent achieved in an electrically polar film 2020-08-18T04:00:00Z When the voltage on the semiconductor ramped up, the electrical resistance did not change continuously. The mathematician who helped to reshape physics 2020-08-03T04:00:00Z And tiny wires positioned between the diamonds track the material’s electrical resistance, to detect superconductivity’s hallmark sharp plunge to zero. Thanks to a bit of diamond smashing, practical superconductivity could be close to reality 2021-08-26T04:00:00Z Because of this, the quantum Hall effect is used to confirm the accuracy of the ohm, the unit of electrical resistance. The quantum Hall effect continues to reveal its secrets to mathematicians and physicists 2020-07-28T04:00:00Z Measuring electrical resistance is straightforward — something that students might do in a high school physics laboratory. Myriam Sarachik Never Gave Up on Physics 2020-08-31T04:00:00Z Those other materials added electrical resistance and slowed down the connections. Applied Materials takes aim at chip speed bottleneck with new tech 2020-07-20T04:00:00Z Superconductivity is an effect in which a material’s electrical resistance vanishes and any magnetic field is expelled below a transition temperature. Superconductivity mystery turns 25 2019-12-08T05:00:00Z In a graph of temperature versus electrical resistance, the curve normally showing the drop in electrical resistance at Tc flattens out as the external field increases. Thanks to a bit of diamond smashing, practical superconductivity could be close to reality 2021-08-26T04:00:00Z The electrical resistance of a metal is caused by electrons being scattered from impurities in the material’s atomic lattice or from lattice vibrations called phonons. Electrons in graphene go with the flow 2019-12-03T05:00:00Z The improved injection and transport of charges reduces accumulated electrical resistance during operation,lowers power consumption and increases the lifetime of the LED device. Quantum dots realize their potential 2019-11-26T05:00:00Z When they added three electrons to each cell and dropped the temperature below 2 kelvins, they noticed a sharp drop in electrical resistance, a sign of superconductivity, which they report today in Nature. Trilayer graphene shows signs of superconductivity 2019-07-17T04:00:00Z Each of the 548 points at which these threads overlap is a pressure sensor, because the electrical resistance of the interleaved film decreases when these points are pressed. Bridging the gap between artificial vision and touch 2019-05-28T04:00:00Z A lightning discharge differs from an idealized capacitor discharge in one other key aspect that is highly relevant to needles: the electrical resistance of lightning channels is not constant, and increases strongly with decreasing current. A closer look at lightning reveals needle-like structures 2019-04-16T04:00:00Z He and his collaborators also explained the quantum Hall effect — in which a material’s electrical resistance varies in discrete steps — as another type of topological persistence. New hominin species, asteroid explosion and Sydney Brenner dies 2019-04-09T04:00:00Z The chamber and tunnel were discovered using electrical resistance technology in Summer 2017. Secret 'passage to the underworld' tunnel discovered beneath Mexican pyramid 2018-10-29T04:00:00Z They also noticed that when they applied an external magnetic field to their sample, the near-zero electrical resistance vanished, another sign of superconductivity. Trilayer graphene shows signs of superconductivity 2019-07-17T04:00:00Z The latest study focused on superconductors, which conduct electricity without any electrical resistance, but typically do so at less than 4 degrees above absolute zero, around -269ºC. AI helps unlock ‘dark matter’ of bizarre superconductors 2018-09-13T04:00:00Z This quest involves a lot of trial and error, because nobody fully understands what makes the electrical resistance disappear more readily in some materials than in others. Cosmic Thinker Worries about the Ends of Science and Humanity 2018-03-17T04:00:00Z The surest sign of superconductivity is a sudden plunge to zero in electrical resistance when the temperature drops below a critical threshold. Superconducting materials found in meteorites 2018-03-06T05:00:00Z This effect sees the electrical resistance in a single-atom-thick layer of a crystal jump in discrete steps when the material is placed in magnetic fields of different intensities. The strange topology that is reshaping physics 2017-07-18T04:00:00Z For one, the electrical resistance does not drop completely to zero, which is required for a superconductor. Trilayer graphene shows signs of superconductivity 2019-07-17T04:00:00Z In resistive touchscreens, that changes the electrical resistance of the layers; in capacitive touchscreens, the pressure creates an electrical circuit. Making Flexible Electronics with Nanowire Networks 2017-06-06T04:00:00Z It contains 2,500 electrodes that measure electrical resistance to evaluate the properties of human cells. Biological underpinnings of chronic fatigue syndrome begin to emerge 2017-03-27T04:00:00Z Coleman’s team found that the graphene flakes form a conducting network within the putty, and deforming the material breaks that network apart, rapidly increasing its electrical resistance. Graphene-spiked Silly Putty picks up human pulse 2016-12-07T05:00:00Z The electrical resistance of those fibres changes as they are placed under strain. All sewn up 2016-07-21T04:00:00Z It passes DNA through tiny holes, whose changing electrical resistance is recorded as different molecular “letters”, or bases, pass by. All about the base 2016-06-23T04:00:00Z The long, twisting path increases the electrical resistance faced by traveling electrons, heating the filament to some 3000 degrees Kelvin. How to get that old-fashioned lightbulb glow without wasting so much energy 2016-01-11T05:00:00Z Both approaches exploit materials that change their electrical resistance in the presence of electric current. Hewlett-Packard, SanDisk Join Forces on New-Breed Memory Chips 2015-10-08T04:00:00Z Crucially, its electrical resistance changed dramatically when the researchers applied even tiny amounts of pressure. Graphene-spiked Silly Putty picks up human pulse 2016-12-07T05:00:00Z Besides better batteries the other is superconductivity, a phenomenon that removes electrical resistance when certain materials are cooled below a critical temperature. Electrifying flight 2015-09-17T04:00:00Z The discovery was made using a kind electrical resistance survey, not by excavating. Subterranean river discovered beneath Mexico's Chichen Itza ruins 2015-08-13T04:00:00Z Electrons still follow a long, circuitous path, ensuring that they face a high electrical resistance, and thus heat up the metal so it will glow. How to get that old-fashioned lightbulb glow without wasting so much energy 2016-01-11T05:00:00Z She added that a single semiconductor chip controls the shape of the smart wires, which use electrical resistance to function. Bionic hand uses smart wires to mimic muscle fibers 2015-07-22T04:00:00Z This will very slightly change the thickness of the wires, which in turn very slightly changes their electrical resistance. Bloodhound Diary: November date for debut - BBC News 2015-07-07T04:00:00Z Lacking electrical resistance, superconductors can be wound into electromagnets that produce much stronger fields than conventional copper magnets. Feature: The new shape of fusion 2015-05-21T04:00:00Z “If you measure electrical resistance variation, you can detect even very small displacement variations with high precision.” A Mechanical Sensor Inspired by Spider Biology [Video] 2014-12-12T05:00:00Z The Band is packed with 10 different sensors tracking things like GPS, acceleration, skin temperature, ultraviolet light exposure, heart rate, and stress, as measured by the changes in electrical resistance of a person’s skin. Microsoft's Band Strives to Watch You More Closely 2014-10-30T04:00:00Z Stack two materials, even insulators, on top of one another and voilà: a dramatic drop in electrical resistance can emerge between them. Interface superconductivity found in single crystal 2013-09-25T17:20:25.733Z Measuring this change in electrical resistance will tell us how much load the skin is suffering. Bloodhound Diary: November date for debut - BBC News 2015-07-07T04:00:00Z These conductors may be corrugated or formed in other proper ways to offer the desired electrical resistance. The inventions, researches and writings of Nikola Tesla With special reference to his work in polyphase currents and high potential lighting 2012-03-28T02:00:22.660Z Relative sensitivities are typically measured by their gauge factors—the ratio of change in electrical resistance to mechanical strain. A Mechanical Sensor Inspired by Spider Biology [Video] 2014-12-12T05:00:00Z Garrido's transistors respond to this ion current by altering their electrical resistance, explains James Hone, who specializes in nanoscale devices at Columbia University in New York. Bioelectronics: The bionic material 2012-03-14T22:50:46.020Z The findings suggested a zone of low electrical resistance far below the surface “that is likely a magma chamber,” he said. A Fascinating Growth Spurt at the Uturuncu Volcano in Bolivia 2012-02-14T00:46:20Z Megohm, meg′ōm, n. a unit of electrical resistance, equal to one million ohms. Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) 2012-01-11T03:00:23.770Z The practical electrician has to measure electrical resistance, electromotive forces, and the capacities of condensers. Hawkins Electrical Guide, Number One Questions, Answers, & Illustrations, A Progressive Course of Study for Engineers, Electricians, Students and Those Desiring to acquire a Working Knowledge of Electricity and its Applications 2011-12-24T03:07:54.823Z In today's transistors and microprocessors, this limit is far below other energy losses that generate heat, primarily through the electrical resistance of moving electrons. Magnetic Memory Could Achieve Ultimate Energy Efficiency 2011-07-05T18:11:00Z With superconductivity, those tortuous movements are removed; electrons career through a material unimpeded because of the lack of electrical resistance. Super discovery 2011-04-18T11:50:24Z The magnitude of the current which will flow when a steady P.D. is maintained between the ends of the conductor is determined by what is called the electrical resistance of the conductor. The New Gresham Encyclopedia Volume 4, Part 2: Ebert to Estremadura 2011-04-14T02:00:56.200Z A century on, for more reasons than ever before, physicists and materials scientists remain enthralled with the observation of disappearing electrical resistance. [Introduction to Special Issue] Introduction: Happy 100th, Superconductivity! 2011-04-07T18:25:52.647Z Rotating zinc cathodes were used, with scrapers to prevent the accumulation of a layer of insoluble magnesium compounds, which would otherwise increase the electrical resistance beyond reasonable limits. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z It was not with the view of making money that Newton discovered and propounded the laws of gravity, or Ohm the laws of electrical resistance. Twentieth Century Socialism What It Is Not; What It Is: How It May Come 2011-01-17T03:00:51.213Z One concern about the new sheets is their electrical resistances, which are some 10 times or more than those of the metal foils used as current collectors in conventional batteries. Carbon Nanotubes Turn Office Paper into Batteries 2011-01-10T07:46:20.130Z In addition to light, heat has also been found to vary the electrical resistance of selenium in a very remarkable manner. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 At the electronics lab, electrodes were attached to him and careful readings were made of the natural electrical resistance of his body, and of his apparent physical charge. The Secret of the Ninth Planet The fuzes must obviously be of uniform electrical resistance, to ensure that all the connected charges will explode simultaneously. Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 1 "Bisharin" to "Bohea" The electrical resistance thermometer of platinum presents very great advantages for this purpose over the mercury thermometer in point of reproducibility, accuracy and adaptability to the practical conditions of experiment. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 1 "Calhoun" to "Camoens" The construction of a standard of electrical resistance consisting of mercury in a glass tube is an operation requiring considerable precautions, and only to be undertaken by those experienced in the matter. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8 "Conduction, Electric" It can thus be shown not only that definite lines of least electrical resistance exist in the earth, but also that natural currents of greater or less strength are almost constantly passing along these lines. Twentieth Century Inventions A Forecast The conclusion seems to be justified that if the metal could be still further cooled until it reached the theoretical "absolute zero," or absolutely heatless condition, the electrical resistance would also be nil. A History of Science, Volume 5(of 5) Aspects Of Recent Science Carbon from the vapour is deposited all over the filament until the required electrical resistance is attained. How it Works Dealing in simple language with steam, electricity, light, heat, sound, hydraulics, optics, etc., and with their applications to apparatus in common use The unit of electrical resistance is called the ohm—named after a man, as are all electrical units. Electricity for the farm Light, heat and power by inexpensive methods from the water wheel or farm engine A superconductor is a material which has no electrical resistance whatever. Long Ago, Far Away Other kinds of moist formations, both metalliferous and non-metalliferous, may influence the lines of least electrical resistance, besides those containing the particular metal which is being sought for. Twentieth Century Inventions A Forecast When the wire is at the temperature of the furnace, it is connected by wires with a Wheatstone Bridge, a delicate device for measuring electrical resistance, and an electric current is passed through the wire. The Working of Steel Annealing, Heat Treating and Hardening of Carbon and Alloy Steel Lead, when reduced to a temperature approaching absolute zero as closely as, for instance, liquid helium, has no electrical resistance. Invaders from the Infinite Owing to the low electrical resistance of tantalum, a filament in order to operate satisfactorily on a standard voltage must be long and thin. Artificial Light Its Influence upon Civilization This last quality and its high electrical resistance give bakelite its chief field of usefulness. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries A fuse is made by combining a number of metals in such a way that the resulting substance has a low melting point and a high electrical resistance. General Science The electrical resistance of these gum solutions steadily diminishes as the temperature increases, and the curve is similar to those obtained for rate of change with temperature. Scientific American Supplement, No. 821, September 26, 1891 An electric current was passed through the carbon particles, whose electrical resistance was varied by the changing pressure from the diaphragm. Masters of Space Morse, Thompson, Bell, Marconi, Carty For example, selenium changes its electrical resistance under the influence of light and many applications of this phenomenon have been made. Artificial Light Its Influence upon Civilization The electrical resistance of the synthetic product is 20 per cent, higher than the natural, so it is excellent for insulation, but it is inferior in elasticity. Creative Chemistry Descriptive of Recent Achievements in the Chemical Industries It is like working out a problem in electrical resistance by a nice convenient algebraical formula. All in It : K(1) Carries On A Continuation of the First Hundred Thousand Mr. S. Skinner, of Cambridge, was also good enough to determine the electrical resistances of these solutions and the Ghattis and gum arabics employed in their preparation. Scientific American Supplement, No. 821, September 26, 1891 In this way the necessary electrical resistance can very conveniently be inserted between the anode and cathode surfaces. Scientific American Supplement, No. 586, March 26, 1887 This "treated" filament has a coating of hard carbon and its electrical resistance is greater than that of the untreated filament. Artificial Light Its Influence upon Civilization Moreover, the Count Du Moncel, as far back as 1856, had clearly discovered that when powdered carbon was subjected to pressure, its electrical resistance altered, and had made a number of experiments on the phenomenon. Heroes of the Telegraph The electrical resistance in the circuit constituted by the apparatus being very small, no electrical power is wasted. Scientific American Supplement, No. 433, April 19, 1884 One of these brushes, b', is connected to the spindle, c, through an electrical resistance of plumbago, arranged as shown in Fig. Scientific American Supplement, No. 392, July 7, 1883 Its high electrical resistance makes it valuable for regulating devices and rheostats. Oxy-Acetylene Welding and Cutting Electric, Forge and Thermit Welding together with related methods and materials used in metal working and the oxygen process for removal of carbon When an ocean cable is injured or broken the precise location of the trouble is made by measuring the electrical resistance of the parts on each side of the injury. Steam, Steel and Electricity Du Moncel had observed that powder of carbon altered in electrical resistance under pressure, and Edison found that lamp-black was so sensitive as to change in resistance under the impact of the sonorous waves. The Story of Electricity The action of the photophone is based on the peculiar fact observed in 1873 by Mr J E Mayhew, that the electrical resistance of crystalline selenium diminishes when a ray of light falls upon it. The Story of Electricity A good lightning conductor should not have a higher electrical resistance than 10 ohms from the point to the ground, including the "earth" contact. The Story of Electricity |
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